AM79C100 Advanced Micro Devices, AM79C100 Datasheet - Page 18

• Manufacturer Part Number: AM79C100
• Description: Twisted-Pair Ethernet Transceiver Plus (TPEX Plus)
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS (Continued)
Notes:
1. Parameter not tested.
2. Uses switching test load.
3. DO pulses narrower than t
4. DO pulses narrower than t
5. RXD pulses narrower than t
18
Parameter
Receive Timing
Collision Detection and SQE Test
Symbol
t
t
internal DO carrier sense off.
internal RXD carrier sense off.
t
t
t
RCVOFF
COLOFF
PWKRD
RCVON
t
COLON
t
t
t
t
t
t
t
SQED
t
t
RETD
t
COFF
t
SQEL
CPW
RON
RHD
t
t
CON
RVB
RSD
RLD
t
PER
RM
RR
RF
RXD Pulse Width Maintain/
Turn-Off Threshold
Receiver Start Up Delay
(RXD to DI )
First Validly Timed Bit
on DI
Receiver Static Propagation
Delay (RXD to DI )
DI End of Transmission
RXD
and DI–
RXD
and DI–
DI+, DI–, CI+, CI– Rise Time
(10% to 90%)
DI+, DI–, CI+, CI– Fall Time
(10% to 90%)
DI and CI Rise and Fall
Time Mismatch (t
RCV Asserted Delay
RCV De-asserted Delay
Collision Turn-On
Delay (CI )
Collision Turn-Off
Delay (CI )
Collision Period (CI )
Collision Output Pulse Width
(CI )
SQE Test Delay Time
SQE Test Length
COL Asserted Delay
COL De-asserted Delay
Parameter Description
to DI+
to DI+
Delay
Delay
PWODO
PWKDO
PWKRD
RR
(min) will be rejected; pulses wider than t
(min) will maintain internal DO carrier sense on; pulses wider than t
(min) will maintain internal RXD carrier sense on; pulses wider than t
– t
RF
)
V
(Note 5)
Tested with 5 MHz
Sinusoid
(Note 1)
(Note 1)
Am79C100
IN
>V
Test Conditions
THS
min
PWODO
(max) will turn internal DO carrier sense on.
t
t
t
t
RSD
RSD
RON
CON
Min
136
200
200
600
500
20
87
40
20
– 2.5
– 2.5
– 50
– 50
PWKDO
t
t
t
PWKRD
t
t
RON
CON
RON
RSD
RSD
1600
1500
Max
200
400
500
500
117
70
62
60
62
5
5
2
+ 100
+ 100
+ 100
+ 2.5
+ 2.5
(max) will turn
(max) will turn
AMD
Unit
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns